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Keya Paha River

Field	Value
name	Keya Paha River
image	Keya Paha River from above Lewis Bridge 2.JPG
image_caption	Keya Paha River near Nebraska-South Dakota border
map	Wpdms nasa topo keya paha river.jpg
map_caption	Keya Paha River in light green at right center
subdivision_type1	Country
subdivision_name1	United States
subdivision_type2	State
subdivision_name2	South Dakota, Nebraska
length	127 mi
discharge1_location	near Naper
discharge1_avg	139 cu/ft. per sec.
source1	Todd County, South Dakota
source1_coordinates
mouth	Niobrara River in Boyd County, Nebraska
mouth_coordinates
basin_size	1710 sqmi

The Keya Paha River ( ) through the U.S. states of South Dakota and Nebraska.

The name is derived from the Dakota language ke'-ya pa-ha, meaning "turtle hill", The river's name was given to Keya Paha County, Nebraska, through which it flows.

The river originates in Todd County in south central South Dakota, at the confluence of Antelope Creek and Rock Creek near the town of Hidden Timber.

In 1861, the border between the Nebraska and Dakota territories followed the Keya Paha River from the 43rd parallel to the river's confluence with the Niobrara; it then followed the Niobrara to Missouri. This situation lasted until 1882 when the boundary was changed to follow the 43rd parallel all the way to Missouri; the change added portions of Keya Paha and Boyd counties to Nebraska.

Discharge

At a gaging station south of Naper in Boyd County, the river's mean discharge was 138.6 cuft/s. The maximum mean annual discharge was 389.4 cuft/s, recorded in 1962; the minimum mean annual discharge was 44.5 cuft/s, recorded in 1976. The peak flow recorded at that point was 9280 cuft/s, registered on July 1, 1962. From July 22 to July 30, 1976, the discharge was recorded as zero.

References

"USGS Surface Water data for Nebraska: USGS Surface-Water Annual Statistics".
is a river flowing {{convert. 127. link. (2012-03-29 , accessed March 30, 2011)
Federal Writers' Project. (1940). "South Dakota place-names, v.3". University of South Dakota.
(2001). "The Geography of South Dakota". The Center for Western Studies – [[Augustana College (South Dakota).
Kay, John and Mary Findlay (1988). {{usurped
''Nebraska Atlas and Gazetteer''. Freeport, Maine: Delorme. 3rd edition, 2005. p. 23.
{{cite gnis
[http://www.nacone.org/webpages/counties/countywebs/keya_paha.htm "Keya Paha History".] [http://www.nacone.org/Default.aspx Nebraska Association of County Officials.] {{webarchive. link. (2010-06-05 Retrieved 2011-02-26.)
Calculated from mean annual values for years 1958–1994 inclusive, found at [https://waterdata.usgs.gov/nwis/annual/?referred_module=sw&site_no=06464900&por_06464900_1=593976,00060,1,1958,1994&year_type=W&format=html_table&date_format=YYYY-MM-DD&rdb_compression=file&submitted_form=parameter_selection_list "USGS 06464900 Keya Paha River Near Naper, Nebr."] [https://waterdata.usgs.gov/nwis USGS Water Data for the Nation.] Retrieved 2011-02-26.
Peak flows for years 1958—1994 inclusive, found at [https://nwis.waterdata.usgs.gov/ne/nwis/peak?site_no=06464900&agency_cd=USGS&format=html "Peak Streamflow for Nebraska: USGS 06464900 Keya Paha River Near Naper, Nebr."] [https://waterdata.usgs.gov/nwis USGS Water Data for the Nation.] Retrieved 2011-02-26.
Daily data for July 1–August 31, 1976, found at [https://nwis.waterdata.usgs.gov/ne/nwis/dv?cb_00060=on&format=html&begin_date=1976-07-01&end_date=1976-08-31&site_no=06464900&referred_module=sw "USGS 06464900 Keya Paha River Near Naper, Nebr."] [https://waterdata.usgs.gov/nwis USGS Water Data for the Nation.] Retrieved 2011-02-26.
Fitzpatrick, Lilian Linder (1925). [http://www.usgennet.org/usa/ne/topic/resources/OLLibrary/Maps_Atlas/nebplacenames/placename5.html#keyapaha "Keya Paha County".] [http://www.usgennet.org/usa/ne/topic/resources/OLLibrary/Maps_Atlas/nebplacenames/index.html ''Nebraska Place-Names''.] Retrieved 2011-02-26.
McNally, Hannah, and Diana Lambdin Meyer (1997). ''Nebraska: Off the Beaten Path''. Morris Book Publishing LLC. p. 81.
Visher, Stephen Sargent (1918). [https://books.google.com/books?id=dy56AAAAMAAJ ''The Geography of South Dakota''.] p. 11.
Carter, Janet M. (1998). [https://pubs.usgs.gov/wri/wri984146/wri984146_files/wri984146.pdf "Water Resources of Mellette and Todd Counties, South Dakota".] USGS Water-Resources Investigations Report 98-4146. Retrieved 2011-04-26. Map on p. 1.
Seaber, Paul R., F. Paul Kapinos, and George L. Knapp (1987). [https://pubs.usgs.gov/wsp/wsp2294/pdf/wsp_2294.pdf USGS Hydrologic Unit Maps.] U.S. Geological Survey Water-Supply Paper 2294. Cataloging unit 10150006, on p. 39. Retrieved 2011-02-26.

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